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Growth factors (yellow triangles) released in the OA knee joint after PRP injection. TNF-tumor necrosis factor, IGF-insulin-like growth factor, TGF-transforming growth factor. VEGF-vascular endothelial growth factor, ADAMTS-a disintegrin and metalloproteinase with thrombospondin-like motifs, IL-interleukin, MMP-matrix metalloproteinase, EGF-epidermal growth factor, HGF-hepatocyte growth factor, FGF-fibroblast growth factor, KGF-keratinocyte growth factor, PF-4-platelet factor 4.
